A Study on the Relationship between Sea Surface Temperature, Sea Surface Air Temperature and Sea Surface Winds Using Ship-Collected Data in the Western Seto Inland Sea, Japan

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  • 瀬戸内海西部における船舶観測から見えた海面水温， 海上気温と海上風の関係
  • セトナイカイ セイブ ニ オケル センパク カンソク カラ ミエタ カイメン スイオン,カイジョウ キオン ト カイジョウフウ ノ カンケイ

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Abstract

Using ship-collected field data from the western Seto Inland Sea in Japan, we investigated the relationship between sea surface temperature（SST）and sea surface air temperature（SSAT）, and that between SST and sea surface wind speed. We found a significant correlation between SST and SSAT. Since the horizontal gradient is larger in SST than in SSAT and the horizontal gradient of SSAT is larger over the sea than at land stations, we concluded that the spatial variation in SSAT is caused by that in SST. On the other hand, we did not find significant correlation between SST and sea surface wind speed observed at the same place. However, we found a significant correlation between SST and wind speed observed at sites in terms of their distance in the downwind direction. This result suggests that the response of sea surface wind to spatial variation in SST needs time. The different response times of SSAT and sea surface wind speed to SST may be attributable to different physical processes involved in the response. The response of SSAT to SST is caused by air-sea heat exchange, but the response of sea surface wind to SST is by the variations inside the atmospheric boundary layer.

Journal

  • Bulletin on Coastal Oceanography

    Bulletin on Coastal Oceanography 50 (1), 61-69, 2012

    Coastal Oceanography Research Committee, the Oceanographic Society of Japan

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